Please refer to the Detailed Design Documents directory for additional and original documents from this phase.
Team Vision for Detailed Design Phase
The Body Cooling System team planned on completing all of the outstanding MSD I tasks during this phase. This included the following:
- Finalizing the test set-up design
- Creating models of the test set-up
- Ordering additional materials for testing
- Creating a Design of Experiments for testing the PCM, wicking, and insulative materials
- Ordering a laptop for testing
- Researching and trying methods for sealing the PCM
All of these tasks were completed successfully during this phase, although we are still continuing to collaborate with the Industrial Design team in order to figure out the best way to package and seal the PCM. Starting in the first week of MSD II, we will launch our testing phases which are outlined below in the plans for MSD II.
|PCM Property Testing|
Above is shown a sample piece of data, marked to show the relevant parts of information and what is obtained through the analysis of the plot.
Ideally, the temperature profile of the PCM should increase as the solid warms, then level as the solid melts before increasing again as a liquid. In actuality, the curve will likely have softer changes as the inner PCM will likely begin melting before the outer side does. Regardless, the curve will provide helpful direction in identifying the best system.
With the PCM temperature profile, we should be able to see a general slope associated with each rise as a solid and a liquid. The slopes of these lines will reflect the specific heats. The length of the middle flat tier will reflect the heat of fusion. It is desirable for our system to produce a plot with shallow slopes; reflecting a slow warming time and maximum duration of use.
Also important on this graph is the relative value of the surface temperature as compared to the temperature of the PCM. The difference in these temperatures will reflect the quality of the insulation between the PCM and the external environment.
SynDaver Muscular Tissue Plate
- Subcutaneous Fat
- Skeletal Muscle - 6 mm thickness
- Composition: 70% water
- Construction: bonded
- Can withstand heat up to 110 degrees Fahrenheit
- Less complex than the abdominal tissue plate, but accurate enough for testing needs
- Under Armour HeatGear Fabric
- Double-sided fabric
- 4-way stretch
- Odor control.
- 95% Polyester/ 5% Elastane
- Moisture Control Sun Blocker Fabric
- Strength to resist breaks and tears
- Moisture Control System Blocker disperses moisture over wider surface area
- Dries faster than cotton
- Polyester MicroFiber Flatback Mesh Double Circular
- Specially treated with wicking finish
- Used as a lining in medical braces
- Thinsulate general properties
- Hydrophobic fibers
- Exceptional warmth
- Effective when damp
- 3M Thinsulate Platinum J250
- Thickness: 2.5 cm
- Weight: 250 g/m^2
- R-value: 3.9
- 3M Thinsulate Ultra 150
- Thickness: 1.62 cm
- Weight: 180 g/m^2
- R-value: 2.00
Bill of Material (BOM)here.
You can find our current test plan document here.
Design of Experiments
You can find our current design of experiments document here.
Design Review MaterialsFor the Detailed Design Review presentation, click here.
Plans for MSDIIUpdated Preliminary Timeline for MSDII
- Phase I: Testing of wicking, insulative and phase
change material efficiencies
- Start: January 25th
- End: February 12th
- Phase II: Testing of NexoTherm and PureTemp PCM
- Start: February 15th
- End: February 26th
- Phase III: Testing of prototypes on team
- Start: February 29th
- End: March 11th
- Phase IV: Testing of prototypes on volunteer subjects
- Start: March 14th
- End: April 29th
Paper and presentation preparation
- Start: April 25th
- End: May 6th
Imagine RIT - May 7th